<!--
  parser 主模块组件
  github：https://github.com/jin-yufeng/Parser 
  docs：https://jin-yufeng.github.io/Parser
  插件市场：https://ext.dcloud.net.cn/plugin?id=805
  author：JinYufeng
  update：2020/04/14
-->
<template>
  <view>
    <slot v-if="!nodes.length"/>
    <!--#ifdef APP-PLUS-NVUE-->
    <web-view id="top" ref="web" :src="src" :style="'margin-top:-2px;height:'+height+'px'" @onPostMessage="_message"/>
    <!--#endif-->
    <!--#ifndef APP-PLUS-NVUE-->
    <view id="top" :style="showAm+(selectable?';user-select:text;-webkit-user-select:text':'')" :animation="scaleAm"
          @tap="_tap"
          @touchstart="_touchstart" @touchmove="_touchmove">
      <!--#ifdef H5-->
      <div :id="'rtf'+uid"></div>
      <!--#endif-->
      <!--#ifndef H5-->
      <trees :nodes="nodes" :lazy-load="lazyLoad" :loadVideo="loadVideo"/>
      <image v-for="(item, index) in imgs" v-bind:key="index" :id="index" :src="item" hidden @load="_load"/>
      <!--#endif-->
    </view>
    <!--#endif-->
  </view>
</template>

<script>
// #ifndef H5 || APP-PLUS-NVUE
import trees from './libs/trees';

var cache = {},
    // #ifdef MP-WEIXIN || MP-TOUTIAO
    fs = uni.getFileSystemManager ? uni.getFileSystemManager() : null,
    // #endif
    Parser = require('./libs/MpHtmlParser.js');
var document; // document 补丁包 https://jin-yufeng.github.io/Parser/#/instructions?id=document
// 计算 cache 的 key
function hash(str) {
  for (var i = str.length, val = 5381; i--;)
    val += (val << 5) + str.charCodeAt(i);
  return val;
}

// #endif
// #ifdef H5 || APP-PLUS-NVUE
var rpx = uni.getSystemInfoSync().screenWidth / 750,
    cfg = require('./libs/config.js');
// #endif
// #ifdef APP-PLUS-NVUE
var dom = weex.requireModule('dom');
// #endif
export default {
  name: 'parser',
  data() {
    return {
      // #ifdef APP-PLUS
      loadVideo: false,
      // #endif
      // #ifdef H5
      uid: this._uid,
      // #endif
      // #ifdef APP-PLUS-NVUE
      src: '',
      height: 1,
      // #endif
      // #ifndef APP-PLUS-NVUE
      scaleAm: '',
      showAm: '',
      imgs: [],
      // #endif
      nodes: []
    }
  },
  // #ifndef H5 || APP-PLUS-NVUE
  components: {
    trees
  },
  // #endif
  props: {
    'html': null,
    // #ifndef MP-ALIPAY
    'autopause': {
      type: Boolean,
      default: true
    },
    // #endif
    'autosetTitle': {
      type: Boolean,
      default: true
    },
    // #ifndef H5 || APP-PLUS-NVUE
    'compress': Number,
    'useCache': Boolean,
    'xml': Boolean,
    // #endif
    'domain': String,
    // #ifndef MP-BAIDU || MP-ALIPAY || APP-PLUS
    'gestureZoom': Boolean,
    // #endif
    // #ifdef MP-WEIXIN || MP-QQ || H5 || APP-PLUS
    'lazyLoad': Boolean,
    // #endif
    'selectable': Boolean,
    'tagStyle': Object,
    'showWithAnimation': Boolean,
    'useAnchor': Boolean
  },
  watch: {
    html(html) {
      this.setContent(html);
    }
  },
  mounted() {
    // 图片数组
    this.imgList = [];
    this.imgList.each = function (f) {
      for (var i = 0, len = this.length; i < len; i++)
        this.setItem(i, f(this[i], i, this));
    }
    this.imgList.setItem = function (i, src) {
      if (i == void 0 || !src) return;
      // #ifndef MP-ALIPAY || APP-PLUS
      // 去重
      if (src.indexOf('http') == 0 && this.includes(src)) {
        var newSrc = '';
        for (var j = 0, c; c = src[j]; j++) {
          if (c == '/' && src[j - 1] != '/' && src[j + 1] != '/') break;
          newSrc += Math.random() > 0.5 ? c.toUpperCase() : c;
        }
        newSrc += src.substr(j);
        return this[i] = newSrc;
      }
      // #endif
      this[i] = src;
      // 暂存 data src
      if (src.includes('data:image')) {
        var filePath, info = src.match(/data:image\/(\S+?);(\S+?),(.+)/);
        if (!info) return;
        // #ifdef MP-WEIXIN || MP-TOUTIAO
        filePath = `${wx.env.USER_DATA_PATH}/${Date.now()}.${info[1]}`;
        fs && fs.writeFile({
          filePath,
          data: info[3],
          encoding: info[2],
          success: () => this[i] = filePath
        })
        // #endif
        // #ifdef APP-PLUS
        filePath = `_doc/parser_tmp/${Date.now()}.${info[1]}`;
        var bitmap = new plus.nativeObj.Bitmap();
        bitmap.loadBase64Data(src, () => {
          bitmap.save(filePath, {}, () => {
            bitmap.clear()
            this[i] = filePath;
          })
        })
        // #endif
      }
    }
    if (this.html) this.setContent(this.html);
  },
  beforeDestroy() {
    // #ifdef H5
    if (this._observer) this._observer.disconnect();
    // #endif
    this.imgList.each(src => {
      // #ifdef APP-PLUS
      if (src && src.includes('_doc')) {
        plus.io.resolveLocalFileSystemURL(src, entry => {
          entry.remove();
        });
      }
      // #endif
      // #ifdef MP-WEIXIN || MP-TOUTIAO
      if (src && uni.env && src.includes(uni.env.USER_DATA_PATH))
        fs && fs.unlink({
          filePath: src
        })
      // #endif
    })
    clearInterval(this._timer);
  },
  methods: {
    // #ifdef H5 || APP-PLUS-NVUE
    _Dom2Str(nodes) {
      var str = '';
      for (var node of nodes) {
        if (node.type == 'text')
          str += node.text;
        else {
          str += ('<' + node.name);
          for (var attr in node.attrs || {})
            str += (' ' + attr + '="' + node.attrs[attr] + '"');
          if (!node.children || !node.children.length) str += '>';
          else str += ('>' + this._Dom2Str(node.children) + '</' + node.name + '>');
        }
      }
      return str;
    },
    _handleHtml(html, append) {
      if (typeof html != 'string') html = this._Dom2Str(html.nodes || html);
      // 处理 rpx
      if (html.includes('rpx'))
        html = html.replace(/[0-9.]+\s*rpx/g, $ => parseFloat($) * rpx + 'px');
      if (!append) {
        // 处理 tag-style 和 userAgentStyles
        var style = '<style>@keyframes show{0%{opacity:0}100%{opacity:1}}';
        for (var item in cfg.userAgentStyles)
          style += `${item}{${cfg.userAgentStyles[item]}}`;
        for (item in this.tagStyle)
          style += `${item}{${this.tagStyle[item]}}`;
        style += '</style>';
        html = style + html;
      }
      return html;
    },
    // #endif
    setContent(html, append) {
      // #ifdef APP-PLUS-NVUE
      if (!html) {
        this.src = '';
        this.height = 1;
        return;
      }
      if (append) return;
      plus.io.resolveLocalFileSystemURL('_doc', entry => {
        entry.getDirectory('parser_tmp', {
          create: true
        }, entry => {
          var fileName = Date.now() + '.html';
          entry.getFile(fileName, {
            create: true
          }, entry => {
            entry.createWriter(writer => {
              writer.onwriteend = () => {
                this.nodes = [1];
                this.src = '_doc/parser_tmp/' + fileName;
                this.$nextTick(function () {
                  entry.remove();
                })
              }
              html =
                  '<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1' +
                  (this.selectable ? '' : ',user-scalable=no') +
                  '"><script type="text/javascript" src="https://js.cdn.aliyun.dcloud.net.cn/dev/uni-app/uni.webview.1.5.2.js"></' +
                  'script><base href="' + this.domain + '">' + this._handleHtml(html) +
                  '<script>"use strict";function post(t){uni.postMessage({data:t})}' +
                  (this.showWithAnimation ? 'document.body.style.animation="show .5s",' : '') +
                  'document.addEventListener("UniAppJSBridgeReady",function(){post({action:"load",text:document.body.innerText});var t=document.getElementsByTagName("title");t.length&&post({action:"getTitle",title:t[0].innerText});for(var e,o=document.getElementsByTagName("img"),n=[],i=0,r=0;e=o[i];i++)e.onerror=function(){post({action:"error",source:"img",target:this})},e.hasAttribute("ignore")||"A"==e.parentElement.nodeName||(e.i=r++,n.push(e.src),e.onclick=function(){post({action:"preview",img:{i:this.i,src:this.src}})});post({action:"getImgList",imgList:n});for(var a,s=document.getElementsByTagName("a"),c=0;a=s[c];c++)a.onclick=function(){var t,e=this.getAttribute("href");if("#"==e[0]){var r=document.getElementById(e.substr(1));r&&(t=r.offsetTop)}return post({action:"linkpress",href:e,offset:t}),!1};;for(var u,m=document.getElementsByTagName("video"),d=0;u=m[d];d++)u.style.maxWidth="100%",u.onerror=function(){post({action:"error",source:"video",target:this})}' +
                  (this.autopause ? ',u.onplay=function(){for(var t,e=0;t=m[e];e++)t!=this&&t.pause()}' : '') +
                  ';for(var g,l=document.getElementsByTagName("audio"),p=0;g=l[p];p++)g.onerror=function(){post({action:"error",source:"audio",target:this})};window.onload=function(){post({action:"ready",height:document.body.scrollHeight})}});</' +
                  'script>';
              writer.write(html);
            });
          })
        })
      })
      // #endif
      // #ifdef H5
      if (!html) {
        if (this.rtf && !append) this.rtf.parentNode.removeChild(this.rtf);
        return;
      }
      var div = document.createElement('div');
      if (!append) {
        if (this.rtf) this.rtf.parentNode.removeChild(this.rtf);
        this.rtf = div;
      } else {
        if (!this.rtf) this.rtf = div;
        else this.rtf.appendChild(div);
      }
      div.innerHTML = this._handleHtml(html, append);
      for (var styles = this.rtf.getElementsByTagName('style'), i = 0, style; style = styles[i++];) {
        style.innerHTML = style.innerHTML.replace(/body/g, '#rtf' + this._uid);
        style.setAttribute('scoped', 'true');
      }
      // 懒加载
      if (!this._observer && this.lazyLoad && IntersectionObserver) {
        this._observer = new IntersectionObserver(changes => {
          for (let item, i = 0; item = changes[i++];) {
            if (item.isIntersecting) {
              item.target.src = item.target.getAttribute('data-src');
              item.target.removeAttribute('data-src');
              this._observer.unobserve(item.target);
            }
          }
        }, {
          rootMargin: '900px 0px 900px 0px'
        })
      }
      var _ts = this;
      // 获取标题
      var title = this.rtf.getElementsByTagName('title');
      if (title.length && this.autosetTitle)
        uni.setNavigationBarTitle({
          title: title[0].innerText
        })
      // 图片处理
      this.imgList.length = 0;
      var imgs = this.rtf.getElementsByTagName('img');
      for (let i = 0, j = 0, img; img = imgs[i]; i++) {
        img.style.maxWidth = '100%';
        var src = img.getAttribute('src');
        if (this.domain && src) {
          if (src[0] == '/') {
            if (src[1] == '/')
              img.src = (this.domain.includes('://') ? this.domain.split('://')[0] : '') + ':' + src;
            else img.src = this.domain + src;
          } else if (!src.includes('://')) img.src = this.domain + '/' + src;
        }
        if (!img.hasAttribute('ignore') && img.parentElement.nodeName != 'A') {
          img.i = j++;
          _ts.imgList.push(img.src || img.getAttribute('data-src'));
          img.onclick = function () {
            var preview = true;
            this.ignore = () => preview = false;
            _ts.$emit('imgtap', this);
            if (preview) {
              uni.previewImage({
                current: this.i,
                urls: _ts.imgList
              });
            }
          }
        }
        img.onerror = function () {
          _ts.$emit('error', {
            source: 'img',
            target: this
          });
        }
        if (_ts.lazyLoad && this._observer && img.src && img.i != 0) {
          img.setAttribute('data-src', img.src);
          img.removeAttribute('src');
          this._observer.observe(img);
        }
      }
      // 链接处理
      var links = this.rtf.getElementsByTagName('a');
      for (var link of links) {
        link.onclick = function () {
          var jump = true,
              href = this.getAttribute('href');
          _ts.$emit('linkpress', {
            href,
            ignore: () => jump = false
          });
          if (jump && href) {
            if (href[0] == '#') {
              if (_ts.useAnchor) {
                _ts.navigateTo({
                  id: href.substr(1)
                })
              }
            } else if (href.indexOf('http') == 0 || href.indexOf('//') == 0)
              return true;
            else {
              uni.navigateTo({
                url: href
              })
            }
          }
          return false;
        }
      }
      // 视频处理
      var videos = this.rtf.getElementsByTagName('video');
      _ts.videoContexts = videos;
      for (let video, i = 0; video = videos[i++];) {
        video.style.maxWidth = '100%';
        video.onerror = function () {
          _ts.$emit('error', {
            source: 'video',
            target: this
          });
        }
        video.onplay = function () {
          if (_ts.autopause)
            for (let item, i = 0; item = _ts.videoContexts[i++];)
              if (item != this) item.pause();
        }
      }
      // 音频处理
      var audios = this.rtf.getElementsByTagName('audios');
      for (var audio of audios)
        audio.onerror = function () {
          _ts.$emit('error', {
            source: 'audio',
            target: this
          });
        }
      this.document = this.rtf;
      if (!append) document.getElementById('rtf' + this._uid).appendChild(this.rtf);
      this.$nextTick(() => {
        this.nodes = [1];
        this.$emit('load');
      })
      setTimeout(() => this.showAm = '', 500);
      // #endif
      // #ifndef H5 || APP-PLUS-NVUE
      var nodes;
      if (!html)
        return this.nodes = [];
      else if (typeof html == 'string') {
        let parser = new Parser(html, this);
        // 缓存读取
        if (this.useCache) {
          var hashVal = hash(html);
          if (cache[hashVal])
            nodes = cache[hashVal];
          else {
            nodes = parser.parse();
            cache[hashVal] = nodes;
          }
        } else nodes = parser.parse();
        this.$emit('parse', nodes);
      } else if (Object.prototype.toString.call(html) == '[object Array]') {
        // 非本插件产生的 array 需要进行一些转换
        if (html.length && html[0].PoweredBy != 'Parser') {
          let parser = new Parser(html, this);
          (function f(ns) {
            for (var i = 0, n; n = ns[i]; i++) {
              if (n.type == 'text') continue;
              n.attrs = n.attrs || {};
              for (var item in n.attrs)
                if (typeof n.attrs[item] != 'string') n.attrs[item] = n.attrs[item].toString();
              parser.matchAttr(n, parser);
              if (n.children && n.children.length) {
                parser.STACK.push(n);
                f(n.children);
                parser.popNode(parser.STACK.pop());
              } else n.children = void 0;
            }
          })(html);
        }
        nodes = html;
      } else if (typeof html == 'object' && html.nodes) {
        nodes = html.nodes;
        console.warn('错误的 html 类型：object 类型已废弃');
      } else
        return console.warn('错误的 html 类型：' + typeof html);
      // #ifdef APP-PLUS
      this.loadVideo = false;
      // #endif
      if (document) this.document = new document(this.nodes, 'nodes', this);
      if (append) this.nodes = this.nodes.concat(nodes);
      else this.nodes = nodes;
      if (nodes.length && nodes[0].title && this.autosetTitle)
        uni.setNavigationBarTitle({
          title: nodes[0].title
        })
      this.$nextTick(() => {
        this.imgList.length = 0;
        this.videoContexts = [];
        // #ifdef MP-TOUTIAO
        setTimeout(() => {
          // #endif
          var f = (cs) => {
            for (let i = 0, c; c = cs[i++];) {
              if (c.$options.name == 'trees') {
                for (var j = c.nodes.length, item; item = c.nodes[--j];) {
                  if (item.c) continue;
                  if (item.name == 'img') {
                    this.imgList.setItem(item.attrs.i, item.attrs.src);
                    // #ifndef MP-ALIPAY
                    if (!c.observer && !c.imgLoad && item.attrs.i != '0') {
                      if (this.lazyLoad && uni.createIntersectionObserver) {
                        c.observer = uni.createIntersectionObserver(c);
                        c.observer.relativeToViewport({
                          top: 900,
                          bottom: 900
                        }).observe('._img', () => {
                          c.imgLoad = true;
                          c.observer.disconnect();
                        })
                      } else
                        c.imgLoad = true;
                    }
                    // #endif
                  }
                  // #ifndef MP-ALIPAY
                  else if (item.name == 'video') {
                    var ctx = uni.createVideoContext(item.attrs.id, c);
                    ctx.id = item.attrs.id;
                    this.videoContexts.push(ctx);
                  }
                  // #endif
                  // #ifdef MP-BAIDU || MP-ALIPAY || APP-PLUS
                  if (item.attrs && item.attrs.id) {
                    this.anchors = this.anchors || [];
                    this.anchors.push({
                      id: item.attrs.id,
                      node: c
                    })
                  }
                  // #endif
                }
              }
              if (c.$children.length)
                f(c.$children)
            }
          }
          f(this.$children);
          // #ifdef MP-TOUTIAO
        }, 200)
        this.$emit('load');
        // #endif
        // #ifdef APP-PLUS
        setTimeout(() => {
          this.loadVideo = true;
        }, 3000);
        // #endif
      })
      // #endif
      // #ifndef APP-PLUS-NVUE
      var height;
      clearInterval(this._timer);
      this._timer = setInterval(() => {
        // #ifdef H5
        var res = [this.rtf.getBoundingClientRect()];
        // #endif
        // #ifndef H5
        // #ifdef APP-PLUS
        uni.createSelectorQuery().in(this)
        // #endif
        // #ifndef APP-PLUS
        this.createSelectorQuery()
            // #endif
            .select('#top').boundingClientRect().exec(res => {
          // #endif
          this.width = res[0].width;
          if (res[0].height == height) {
            this.$emit('ready', res[0])
            clearInterval(this._timer);
          }
          height = res[0].height;
          // #ifndef H5
        });
        // #endif
      }, 350)
      if (this.showWithAnimation && !append) this.showAm = 'animation:show .5s';
      // #endif
    },
    getText(ns = this.nodes) {
      // #ifdef APP-PLUS-NVUE
      return this._text;
      // #endif
      // #ifdef H5
      return this.rtf.innerText;
      // #endif
      // #ifndef H5 || APP-PLUS-NVUE
      var txt = '';
      for (var i = 0, n; n = ns[i++];) {
        if (n.type == 'text') txt += n.text.replace(/&nbsp;/g, '\u00A0').replace(/&lt;/g, '<').replace(/&gt;/g, '>')
            .replace(/&amp;/g, '&');
        else if (n.type == 'br') txt += '\n';
        else {
          // 块级标签前后加换行
          var block = n.name == 'p' || n.name == 'div' || n.name == 'tr' || n.name == 'li' || (n.name[0] == 'h' && n.name[1] >
              '0' && n.name[1] < '7');
          if (block && txt && txt[txt.length - 1] != '\n') txt += '\n';
          if (n.children) txt += this.getText(n.children);
          if (block && txt[txt.length - 1] != '\n') txt += '\n';
          else if (n.name == 'td' || n.name == 'th') txt += '\t';
        }
      }
      return txt;
      // #endif
    },
    navigateTo(obj) {
      if (!this.useAnchor)
        return obj.fail && obj.fail({
          errMsg: 'Anchor is disabled'
        })
      // #ifdef APP-PLUS-NVUE
      if (!obj.id)
        dom.scrollToElement(this.$refs.web);
      else
        this.$refs.web.evalJs('var pos=document.getElementById("' + obj.id +
            '");if(pos)post({action:"linkpress",href:"#",offset:pos.offsetTop})');
      return obj.success && obj.success({
        errMsg: 'pageScrollTo:ok'
      });
      // #endif
      // #ifdef H5
      if (!obj.id) {
        window.scrollTo(0, this.rtf.offsetTop);
        return obj.success && obj.success({
          errMsg: 'pageScrollTo:ok'
        });
      }
      var target = document.getElementById(obj.id);
      if (!target) return obj.fail && obj.fail({
        errMsg: 'Label not found'
      });
      obj.scrollTop = this.rtf.offsetTop + target.offsetTop;
      uni.pageScrollTo(obj);
      // #endif
      // #ifndef H5
      var Scroll = (selector, component) => {
        uni.createSelectorQuery().in(component ? component : this).select(selector).boundingClientRect().selectViewport()
            .scrollOffset()
            .exec(res => {
              if (!res || !res[0])
                return obj.fail && obj.fail({
                  errMsg: 'Label not found'
                });
              obj.scrollTop = res[1].scrollTop + res[0].top;
              uni.pageScrollTo(obj);
            })
      }
      if (!obj.id) Scroll('#top');
      else {
        // #ifndef MP-BAIDU || MP-ALIPAY || APP-PLUS
        Scroll('#top >>> #' + obj.id + ', #top >>> .' + obj.id);
        // #endif
        // #ifdef MP-BAIDU || MP-ALIPAY || APP-PLUS
        for (var anchor of this.anchors)
          if (anchor.id == obj.id)
            Scroll('#' + obj.id + ', .' + obj.id, anchor.node);
        // #endif
      }
      // #endif
    },
    getVideoContext(id) {
      // #ifndef APP-PLUS-NVUE
      if (!id) return this.videoContexts;
      else
        for (var i = this.videoContexts.length; i--;)
          if (this.videoContexts[i].id == id) return this.videoContexts[i];
      // #endif
    },
    // 预加载
    preLoad(html, num) {
      // #ifdef H5 || APP-PLUS-NVUE
      if (html.constructor == Array)
        html = this._Dom2Str(html);
      var script = "var contain=document.createElement('div');contain.innerHTML='" + html.replace(/'/g, "\\'") +
          "';for(var imgs=contain.querySelectorAll('img'),i=imgs.length-1;i>=" + num +
          ";i--)imgs[i].removeAttribute('src');";
      // #endif
      // #ifdef APP-PLUS-NVUE
      this.$refs.web.evalJs(script);
      // #endif
      // #ifdef H5
      eval(script);
      // #endif
      // #ifndef H5 || APP-PLUS-NVUE
      if (typeof html == 'string') {
        var id = hash(html);
        html = new Parser(html, this).parse();
        cache[id] = html;
      }
      var wait = [];
      (function f(ns) {
        for (var i = 0, n; n = ns[i++];) {
          if (n.name == 'img' && n.attrs.src && !wait.includes(n.attrs.src))
            wait.push(n.attrs.src);
          f(n.children || []);
        }
      })(html);
      if (num) wait = wait.slice(0, num);
      this._wait = (this._wait || []).concat(wait);
      if (!this.imgs) this.imgs = this._wait.splice(0, 15);
      else if (this.imgs.length < 15)
        this.imgs = this.imgs.concat(this._wait.splice(0, 15 - this.imgs.length));
      // #endif
    },
    // #ifdef APP-PLUS-NVUE
    _message(e) {
      // 接收 web-view 消息
      var data = e.detail.data[0];
      if (data.action == 'load') {
        this.$emit('load');
        this._text = data.text;
      } else if (data.action == 'getTitle') {
        if (this.autosetTitle)
          uni.setNavigationBarTitle({
            title: data.title
          })
      } else if (data.action == 'getImgList') {
        this.imgList.length = 0;
        for (var i = data.imgList.length; i--;)
          this.imgList.setItem(i, data.imgList[i]);
      } else if (data.action == 'preview') {
        var preview = true;
        data.img.ignore = () => preview = false;
        this.$emit('imgtap', data.img);
        if (preview)
          uni.previewImage({
            current: data.img.i,
            urls: this.imgList
          })
      } else if (data.action == 'linkpress') {
        var jump = true,
            href = data.href;
        this.$emit('linkpress', {
          href,
          ignore: () => jump = false
        })
        if (jump && href) {
          if (href[0] == '#') {
            if (this.useAnchor)
              dom.scrollToElement(this.$refs.web, {
                offset: data.offset
              })
          } else if (href.includes('://'))
            plus.runtime.openWeb(href);
          else
            uni.navigateTo({
              url: href
            })
        }
      } else if (data.action == 'error')
        this.$emit('error', {
          source: data.source,
          target: data.target
        })
      else if (data.action == 'ready') {
        this.height = data.height;
        this.$nextTick(() => {
          uni.createSelectorQuery().in(this).select('#top').boundingClientRect().exec(res => {
            this.rect = res[0];
            this.$emit('ready', res[0]);
          })
        })
      }
    },
    // #endif
    // #ifndef APP-PLUS-NVUE
    // #ifndef H5
    _load(e) {
      if (this._wait.length)
        this.$set(this.imgs, e.target.id, this._wait.shift());
    },
    // #endif
    _tap(e) {
      // #ifndef MP-BAIDU || MP-ALIPAY || APP-PLUS
      if (this.gestureZoom && e.timeStamp - this._lastT < 300) {
        var initY = e.touches[0].pageY - e.currentTarget.offsetTop;
        if (this._zoom) {
          this._scaleAm.translateX(0).scale(1).step();
          uni.pageScrollTo({
            scrollTop: (initY + this._initY) / 2 - e.touches[0].clientY,
            duration: 400
          })
        } else {
          var initX = e.touches[0].pageX - e.currentTarget.offsetLeft;
          this._initY = initY;
          this._scaleAm = uni.createAnimation({
            transformOrigin: `${initX}px ${this._initY}px 0`,
            timingFunction: 'ease-in-out'
          });
          // #ifdef MP-TOUTIAO
          this._scaleAm.opacity(1);
          // #endif
          this._scaleAm.scale(2).step();
          this._tMax = initX / 2;
          this._tMin = (initX - this.width) / 2;
          this._tX = 0;
        }
        this._zoom = !this._zoom;
        this.scaleAm = this._scaleAm.export();
      }
      this._lastT = e.timeStamp;
      // #endif
    },
    _touchstart(e) {
      // #ifndef MP-BAIDU || MP-ALIPAY || APP-PLUS
      if (e.touches.length == 1)
        this._initX = this._lastX = e.touches[0].pageX;
      // #endif
    },
    _touchmove(e) {
      // #ifndef MP-BAIDU || MP-ALIPAY || APP-PLUS
      var diff = e.touches[0].pageX - this._lastX;
      if (this._zoom && e.touches.length == 1 && Math.abs(diff) > 20) {
        this._lastX = e.touches[0].pageX;
        if ((this._tX <= this._tMin && diff < 0) || (this._tX >= this._tMax && diff > 0))
          return;
        this._tX += (diff * Math.abs(this._lastX - this._initX) * 0.05);
        if (this._tX < this._tMin) this._tX = this._tMin;
        if (this._tX > this._tMax) this._tX = this._tMax;
        this._scaleAm.translateX(this._tX).step();
        this.scaleAm = this._scaleAm.export();
      }
      // #endif
    }
    // #endif
  }
}
</script>

<style>
@keyframes show {
  0% {
    opacity: 0
  }

  100% {
    opacity: 1;
  }
}

/* #ifdef MP-WEIXIN */
:host {
  display: block;
  overflow: hidden;
  -webkit-overflow-scrolling: touch;
}

/* #endif */
</style>
